<button type="submit">This is valid.</button>
<button type="submit" disabled>This is valid.</button>
<button type="submit" disabled="">This is valid.</button>
<button type="submit" disabled="disabled">This is valid.</button>
<button type="submit" disabled=true>This is valid. This will be disabled.</button>
<button type="submit" disabled='true'>This is valid. This will be disabled.</button>
<button type="submit" disabled="true">This is valid. This will be disabled.</button>
<button type="submit" disabled=false>This is valid. This will be disabled.</button>
<button type="submit" disabled="false">This is valid. This will be disabled.</button>
<button type="submit" disabled='false'>This is valid. This will be disabled.</button>
<button type="submit" disabled=hahah>This is valid. This will be disabled.</button>
<button type="submit" disabled='hahah'>This is valid. This will be disabled.</button>
<button type="submit" disabled="hahah">This is valid. This will be disabled.</button>
<input type="checkbox" checked disabled name="cheese">
<input type="checkbox" checked="checked" disabled="disabled" name="cheese">
<input type='checkbox' checked="" disabled="" name=cheese >
<div lang=""></div>
